//
//  NewFeatureViewController.swift
//  xinlangweibo
//
//  Created by 陈志强 on 15/11/15.
//  Copyright © 2015年 陈志强. All rights reserved.
//

import UIKit

private let reuseIdentifier = "Cell"
private let imageCount = 4

class NewFeatureViewController: UICollectionViewController {

    init(){
        let layout = UICollectionViewFlowLayout()
        
        layout.itemSize = UIScreen.mainScreen().bounds.size
        layout.minimumInteritemSpacing = 0
        layout.minimumLineSpacing = 0
        layout.scrollDirection = .Horizontal
        super.init(collectionViewLayout: layout)
         collectionView?.pagingEnabled = true
        collectionView?.showsHorizontalScrollIndicator = false
        collectionView?.bounces = false
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
       
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()

        

        // Register cell classes
        self.collectionView!.registerClass(NewFeatureCell.self, forCellWithReuseIdentifier: reuseIdentifier)

        
    }

  



    override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of items
        return imageCount
    }

    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! NewFeatureCell
    
        // Configure the cell
        cell.backgroundColor = indexPath.item % 2 == 0 ? UIColor.redColor() : UIColor.greenColor()
        cell.index = indexPath.item
        return cell
    }
    override func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
        let page = Int(scrollView.contentOffset.x / screenW)
        if page == imageCount - 1{
            if let cell = collectionView?.visibleCells().last as? NewFeatureCell {
                cell.startAnimation()
            }
        }
    }


}

class NewFeatureCell : UICollectionViewCell{
    
    var index : Int = 0 {
        didSet{
            //print(index)
            iconImage.image = UIImage(named: "new_feature_\(index + 1)")
            startButton.hidden = true
        }
    }
    
    @objc private func start(){
        print("yongwo ab ")
        //发出通知 
        //NSNotificationCenter.defaultCenter().postNotificationName(AppSwitchRootViewControler, object:nil)
        NSNotificationCenter.defaultCenter().postNotificationName(AppSwitchRootViewControler, object: nil)
    }
    
    private func startAnimation(){
        startButton.transform = CGAffineTransformMakeScale(0, 0)
        UIView.animateWithDuration(1, delay: 0, usingSpringWithDamping: 0.5, initialSpringVelocity: 5, options: [], animations: { () -> Void in
            self.startButton.hidden = false
            self.startButton.transform = CGAffineTransformIdentity
            }) { (_) -> Void in
                print("ok")
        }
    }
    //添加子视图
    override init(frame: CGRect) {
        super.init(frame: frame)
       // print(frame)
        setupUI()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    //设置ui布局
    private func setupUI(){
       contentView.addSubview(iconImage)
       contentView.addSubview(startButton)
        //设置约束
        iconImage .snp_makeConstraints { (make) -> Void in
            make.edges.equalTo(contentView.snp_edges)
        }
        
        startButton .snp_makeConstraints { (make) -> Void in
            make.bottom.equalTo(contentView.snp_bottom).offset(-200)
            make.centerX.equalTo(contentView.snp_centerX)
        }
        
        startButton.addTarget(self, action: "start", forControlEvents: .TouchUpInside)
    }
    //懒加载
    private lazy var iconImage : UIImageView = UIImageView()
    private lazy var startButton : UIButton = UIButton(title: "开始体验", backimage: "new_feature_finish_button", color: nil)
   
}
